Question

Which of the following sets of quantum numbers represents the Electron of \(\mathrm{Cr}(\mathrm{Z}=24) ?\)
(A) \(\left(4,1,-1,+\frac{1}{2}\right)\)
(B) \(\left(4,0,0,+\frac{1}{2}\right)\)
(C) \(\left(3,2,0,-\frac{1}{2}\right)\)
(D) \(\left(3,2,-2,+\frac{1}{2}\right)\)

Answer 1

Ans: (B)
 \({ }_{24} \mathrm{Cr}=\left[{ }_{18} \mathrm{Ar}\right] 4 \mathrm{~s}^{1} 3 \mathrm{~d}^{5}\)
\(19^{\text {th }}\) electron is \(4 \mathrm{~s}^{1}\)

Answer 2

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Answer 3

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